A month ago Lysander pray'd
To Jove, to Cupid, and to Venus,
That he might die if he betray'd
A single vow that pass'd between us.
Ah, careless gods, to hear so ill
And cheat a maid on you relying!
For false Lysander's thriving still,
And 'tis Corinna lies a-dying.

Sir Arthur Quiller-Couch

http://www.poemhunter.com/poem/an-oath-2/